The Food Drug Administration sent a warning letter to Philips Healthcare, warning it of violations found during spot inspections of Philips plants, including one in Andover, Mass. The Food Drug Administration sent a warning letter to Philips Healthcare warning it of violations found during spot inspections of facilities including a plant in Andover, Mass. The letter , sent to Philips Healthcare CEO Steve Rusckowski Oct. 9 and posted on the FDA’s website O